Front portion of a fan housing



FIG. 1 is a top perspective view of a front portion of a fan housing showing my new design;

FIG. 2 is a front elevation view;

FIG. 3 is a left side elevation view thereof, the right side being a mirror image; and,

FIG. 4 is a top perspective view thereof.

The broken-line showing of environmental structure in FIGS. 3 and 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a front portion of a fan housing, as shown and described. 